I don't think that 5.5 hours of sleep is medically recommended for at least the breastfeeding mother of a newborn, since newborns are recommended to eat every 2

I don't think that 5.5 hours of sleep is medically recommended for at least the breastfeeding mother of a newborn, since newborns are recommended to eat every 2-4 hours, even at night. There have been a few times where my newborn has been impossible to awake and slept for 5 hours, but by that point, my breasts are so engorged that they're painful. So the engorgement wakes me up if the newborn doesn't. That being said, I do try to encourage my partner to get as much sleep as possible, so that he can be more rested during the day. I'm fortunate in that I'm fairly functional on not much sleep, a trait that's highly compatible with breastfeeding.